I have an unlocked Samsung Galaxy Note 10.1 N8013 running Gnabo ROM 8 ( Android 4.4.2) with a Kensington Bluetooth keyboard. When typing, somewhere after about 400 words, the keyboard will lag badly. I will often finish an entire sentence before it appears on screen. This does not happen with other apps like AndrOpen Office. Any other similar experiences?

I just installed rev. 749. The lag is less but still there. However, I also installed Blisspop 4.03 (lollipop) prior to installing this update, so my guess is it's either the keyboard or the tablet where the issue is.